...
After days of work, without rebooting my box, it suddenly slowed down. My filesystem is just
[edelarosa@eadelarosa xxx]$ free
total used free shared buffers cached
Mem: 505220 428728 76492 0 16860 195208
-/+ buffers/cache: 216660 288560
Swap: 1052248 194312 857936
Swapping *might* be the cause of your system suddenly slowing down, but it doesn't seem like the most likely thing. Over half of your physical RAM is available.
Run "vmstat 2" and watch the colums under "swap". From my own system:
procs memory swap io system cpu r b swpd free buff cache si so bi bo in cs us sy wa id 0 0 19076 227272 92392 236828 0 0 9 31 218 147 5 6 0 90 0 0 19076 227248 92392 236828 0 0 0 0 180 170 0 0 0 100 0 0 19076 227248 92392 236828 0 0 0 30 192 235 0 0 0 100 0 0 19076 227116 92392 236828 0 0 0 0 287 523 1 0 0 99 0 0 19076 227116 92392 236828 0 0 0 8 246 1294 38 3 0 59
So, over a period of 8 seconds, no blocks were swapped in ("si" column)
and no blocks of memory were swapped out ("so" column). If you see
activity in one of those columns, then your machine is swapping. You
can use that to judge whether swap is affecting your machine.If not swap, you'll have to be more specific about what's slowed down to get more useful advice.
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